{"title":"Engineering Plastics","description":null,"products":[{"product_id":"delrin-black-opaque","title":"Black Acetal Copolymer (POM-C) Sheet (1\/16\" - 1\/4\")","description":"\u003ch1 data-pm-slice=\"1 1 []\"\u003e\u003cspan\u003eBlack Acetal Copolymer (POM-C) Sheet – 1\/16\", 1\/8\" \u0026amp; 1\/4\"\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003ePrecision-machinable engineering plastic with excellent dimensional stability, low friction, chemical resistance, and resistance to centerline porosity. Available in project-ready sizes starting at 4\" × 4\".\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBuild durable, precision-machined components with Black Acetal Copolymer Sheet. Also known as \u003c\/span\u003ePOM-C (polyoxymethylene copolymer)\u003cspan\u003e, this engineering thermoplastic is valued for its excellent machinability, strength, stiffness, low friction, wear resistance, and dimensional stability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUnlike acetal homopolymer (POM-H), acetal copolymer is significantly less susceptible to\u003cstrong\u003e \u003c\/strong\u003e\u003c\/span\u003ecenterline porosity\u003cspan\u003e, an internal defect that can occur in certain homopolymer stock shapes. This makes POM-C particularly attractive for precision-machined components where material consistency and reliable internal structure are important.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAcetal copolymer also offers excellent chemical resistance, low moisture absorption, and good performance across a wide range of mechanical applications. While homopolymer grades can offer somewhat higher stiffness and strength, copolymer provides an excellent balance of mechanical performance, chemical resistance, and processing reliability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eAvailable in 1\/16\", 1\/8\", and 1\/4\" thicknesses, with convenient sheet sizes starting at 4\" × 4\" and 6\" × 6\", Black Acetal Copolymer is ideal for CNC machining, robotics, engineering labs, makerspaces, prototyping, and professional fabrication.\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eWhy Buy from MakerStock?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAcetal Copolymer (POM-C):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Engineering-grade material with excellent machining characteristics and dimensional stability.\u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eStrength \u0026amp; Dimensional Stability:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Rigid, durable material with low moisture absorption.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eThree Thickness Options:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 1\/16\", 1\/8\", and 1\/4\".\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSmall, Project-Ready Sizes:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Starting at 4\" × 4\" and 6\" × 6\" for desktop CNC machines, engineering labs, and prototyping.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAffordable and Fast Shipping:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e $12 flat-rate shipping per 50 lb box across the continental US from our warehouses in PA and UT.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNo Minimum Order Requirements:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Order a single sheet or larger quantities for production and classroom use.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMaterial:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Acetal Copolymer\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePolymer Classification:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e POM-C (Polyoxymethylene Copolymer)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eColor:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Black\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFinish:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Smooth, glossy\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNominal Thicknesses:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 1\/16\" (1.6 mm), 1\/8\" (3.2 mm), 1\/4\" (6.4 mm)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eLight Transmission:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMachinability:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Excellent\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCNC Routable:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Yes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMillable:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Yes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDrillable:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Yes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSawable:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Yes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTurnable:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Yes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTappable:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Yes, with appropriate tooling\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFriction \u0026amp; Wear Resistance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Excellent for many mechanical applications\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDimensional Stability:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Excellent\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMoisture Absorption:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Low\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCenterline Porosity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Lower susceptibility than POM-H; not a guarantee that every sheet is defect-free\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTypical Melting Range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approximately 329–338°F (165–170°C), depending on grade\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMasking:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Unmasked; minor surface imperfections may be present\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTolerances:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e +0\"\/-0.188\"\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eFAQs\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWhat is the difference between acetal copolymer and homopolymer?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBoth are engineering-grade acetal plastics. Homopolymer generally offers somewhat higher mechanical strength and stiffness, while copolymer offers improved resistance to certain chemicals and a reduced risk of centerline porosity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eIs MakerStock's black acetal Delrin?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNo. Delrin is a trade name associated with acetal homopolymer. MakerStock's material is acetal copolymer (POM-C).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eIs acetal copolymer suitable for precision machining?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eYes. POM-C is widely used for CNC-machined gears, bushings, spacers, bearings, fixtures, and other precision mechanical components because of its excellent machinability, dimensional stability, and wear characteristics.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"MakerStock","offers":[{"title":"1\/16\" \/ 1.5mm \/ 4\" x 4\"","offer_id":50055426048097,"sku":"DEL-BLK-062-4-4","price":2.99,"currency_code":"USD","in_stock":true},{"title":"1\/16\" \/ 1.5mm \/ 6\" x 6\"","offer_id":50055426080865,"sku":"DEL-BLK-063-6-6","price":5.99,"currency_code":"USD","in_stock":true},{"title":"1\/16\" \/ 1.5mm \/ 8\" x 12\"","offer_id":42617076908129,"sku":"DEL-BLK-062-8-12","price":16.25,"currency_code":"USD","in_stock":true},{"title":"1\/16\" \/ 1.5mm \/ 12\" x 12\"","offer_id":42617076940897,"sku":"DEL-BLK-062-12-12","price":24.95,"currency_code":"USD","in_stock":true},{"title":"1\/16\" \/ 1.5mm \/ 12\" x 24\"","offer_id":42617077006433,"sku":"DEL-BLK-062-12-24","price":46.95,"currency_code":"USD","in_stock":true},{"title":"1\/16\" \/ 1.5mm \/ 24\" x 24\"","offer_id":42617077039201,"sku":"DEL-BLK-062-24-24","price":89.95,"currency_code":"USD","in_stock":true},{"title":"1\/16\" \/ 1.5mm \/ 24\" x 36\"","offer_id":42617077071969,"sku":"DEL-BLK-062-24-36","price":114.95,"currency_code":"USD","in_stock":true},{"title":"1\/8\" \/ 3mm \/ 4\" x 4\"","offer_id":50055426113633,"sku":"DEL-BLK-125-4-4","price":4.45,"currency_code":"USD","in_stock":true},{"title":"1\/8\" \/ 3mm \/ 6\" x 6\"","offer_id":50055426146401,"sku":"DEL-BLK-125-6-6","price":8.95,"currency_code":"USD","in_stock":true},{"title":"1\/8\" \/ 3mm \/ 8\" x 12\"","offer_id":42617077104737,"sku":"DEL-BLK-125-8-12","price":25.95,"currency_code":"USD","in_stock":true},{"title":"1\/8\" \/ 3mm \/ 12\" x 12\"","offer_id":41699803299937,"sku":"DEL-BLK-125-12-12","price":37.95,"currency_code":"USD","in_stock":true},{"title":"1\/8\" \/ 3mm \/ 12\" x 24\"","offer_id":39267697557601,"sku":"DEL-BLK-125-12-24","price":74.95,"currency_code":"USD","in_stock":true},{"title":"1\/8\" \/ 3mm \/ 24\" x 24\"","offer_id":39267697721441,"sku":"DEL-BLK-125-24-24","price":129.95,"currency_code":"USD","in_stock":true},{"title":"1\/8\" \/ 3mm \/ 24\" x 36\"","offer_id":41699803332705,"sku":"DEL-BLK-125-24-36","price":178.95,"currency_code":"USD","in_stock":true},{"title":"1\/4\" \/ 6mm \/ 4\" x 4\"","offer_id":50055426179169,"sku":"DEL-BLK-250-4-4","price":5.95,"currency_code":"USD","in_stock":true},{"title":"1\/4\" \/ 6mm \/ 6\" x 6\"","offer_id":50055426211937,"sku":"DEL-BLK-250-6-6","price":11.95,"currency_code":"USD","in_stock":true},{"title":"1\/4\" \/ 6mm \/ 8\" x 12\"","offer_id":42617077170273,"sku":"DEL-BLK-250-8-12","price":34.95,"currency_code":"USD","in_stock":true},{"title":"1\/4\" \/ 6mm \/ 12\" x 12\"","offer_id":41699803365473,"sku":"DEL-BLK-250-12-12","price":52.95,"currency_code":"USD","in_stock":true},{"title":"1\/4\" \/ 6mm \/ 12\" x 24\"","offer_id":39267697786977,"sku":"DEL-BLK-250-12-24","price":98.95,"currency_code":"USD","in_stock":true},{"title":"1\/4\" \/ 6mm \/ 24\" x 24\"","offer_id":39267697950817,"sku":"DEL-BLK-250-24-24","price":165.95,"currency_code":"USD","in_stock":true},{"title":"1\/4\" \/ 6mm \/ 24\" x 36\"","offer_id":41699803398241,"sku":"DEL-BLK-250-24-36","price":222.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0076\/1856\/0097\/files\/Glossy_Black_Acrylic_Sheet_Close-Up.png?v=1793823233"}],"url":"https:\/\/makerstock.com\/collections\/engineering-plastics.oembed","provider":"MakerStock","version":"1.0","type":"link"}